// This is free and unencumbered software released into the public domain.
//
// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.
//
// In jurisdictions that recognize copyright laws, the author or authors
// of this software dedicate any and all copyright interest in the
// software to the public domain. We make this dedication for the benefit
// of the public at large and to the detriment of our heirs and
// successors. We intend this dedication to be an overt act of
// relinquishment in perpetuity of all present and future rights to this
// software under copyright law.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
// For more information, please refer to <https://unlicense.org>

package verkle

import "errors"

var (
	errInsertIntoHash         = errors.New("trying to insert into hashed node")
	errDeleteHash             = errors.New("trying to delete from a hashed subtree")
	errDeleteMissing          = errors.New("trying to delete a missing group")
	errDeleteUnknown          = errors.New("trying to delete an out-of-view node")
	errReadFromInvalid        = errors.New("trying to read from an invalid child")
	errSerializeHashedNode    = errors.New("trying to serialize a hashed internal node")
	errInsertIntoOtherStem    = errors.New("insert splits a stem where it should not happen")
	errUnknownNodeType        = errors.New("unknown node type detected")
	errMissingNodeInStateless = errors.New("trying to access a node that is missing from the stateless view")
	errIsPOAStub              = errors.New("trying to read/write a proof of absence leaf node")
)

const (
	// Extension status
	extStatusAbsentEmpty = byte(iota) // missing child node along the path
	extStatusAbsentOther              // path led to a node with a different stem
	extStatusPresent                  // stem was present
)